Cytek Biosciences, Inc.

The following table displays the benefits from income taxes for the three andnine months ended September 30, 2025 and 2024 (in thousands, except percentages):

Benefit from income tax expense was$2.3 million for the three months ended September 30, 2025, as compared to benefit from income tax expense of $0.8 million for the three months ended September 30, 2024. The net increase of $1.5 million for the three months ended September 30, 2025 was primarily due to the combination of a higher effective tax rate for the three months ended September 30, 2025 caused by a higher projected pre-tax loss for 2025 compared to a year ago, which meant the permanently nondeductible item reduced the effective tax rate less than in the same quarter in 2024, and a higher pre-tax loss for the current quarter compared to the three months ended September 30, 2024.

Benefit from income tax expense was $3.3 million for the nine months ended September 30, 2025, as compared to benefit from income tax expense of $0.4 million for the nine months ended September 30, 2024. The net increase of $3.0 million for the nine months ended September 30, 2025 was primarily due to a higher effective tax rate resulting from a larger projected loss for the year and the geographic mix of worldwide project and losses.

17. Lease

The Company determines if an arrangement is or contains a lease at inception, which is the date on which the terms of the contract are agreed to, and the agreement creates enforceable rights and obligations. Under ASC 842, a contract is or contains a lease when (i) explicitly or implicitly identified assets have been deployed in the contract and (ii) the customer obtains substantially all of the economic benefits from the use of that underlying asset and directs how and for what purpose the asset is used during the term of the contract. The Company also considers whether its service arrangements include the right to control the use of an asset.

The Company leases office facilities and equipment from unrelated parties under operating lease agreements that have initial terms ranging from 1 to 12 years. Some leases includeone or more options to renew, generally at the Company’s sole discretion, with renewal terms that can extend the lease term up to 10 years. In addition, certain leases contain termination options, where the rights to terminate are held by either the Company, the lessor, or both parties. These options to extend or terminate a lease are included in the lease terms when it is reasonably certain that the Company will exercise that option. The Company’s leases generally do not contain any material restrictive covenants.

Operating lease cost is recognized on a straight-line basis over the lease term. The components of lease expense are as follows (in thousands):

Supplemental cash flow information related to leases is as follows (in thousands):

Supplemental balance sheet information related to leases is as follows (in thousands):

Future undiscounted cash flows for each of the next five years and thereafter and reconciliation to the lease liabilities recognized on the balance sheet as of September 30, 2025 is as follows (in thousands):

Certain operating leases contain tenant allowance provisions, which obligate the landlord to remit cash to us as an incentive to enter into the lease agreement. We record the full amount to be remitted by the landlord as a reduction to the operating lease right-of-use assets. The amounts are included in prepaid expenses and other current assets on the consolidated balance sheets.

18. Commitments and contingencies

Purchase Obligations

The Company has entered into non-cancelable arrangements with third parties, primarily related to cloud computing and other information technology services. As of September 30, 2025, future payments under these contractual obligations were as follows (in thousands):

Legal proceedings

From time to time, the Company is involved in legal proceedings and claims. On August 14, 2024, Beckman Coulter, Inc. (“Beckman Coulter”) sued the Company in federal court in the District of Delaware, alleging that the Company’s Cytek Aurora flow cytometers, Cytek Aurora CS cell sorters, and Northern Lights and Northern Lights-CLC products infringe U.S. Patent Nos. 10,330,582 and 11,703,443, each titled “Flow Cytometer.” On October 7, 2024, the Company filed an answer denying any liability and including a counterclaim against Beckman Coulter for false marking. On October 28, 2024, Beckman Coulter filed an answer to the counterclaim, denying liability. On January 9, 2025, Beckman Coulter filed a first amended complaint, further alleging that the Company’s Cytek Aurora flow cytometers, Cytek Aurora CS cell sorters, and Northern Lights and Northern Lights-CLC products also infringe U.S. Patent Nos. 12,174,106 and 12,174,107, each of which is also titled “Flow Cytometer” and related to the earlier asserted patents. On February 6, 2025, the Company filed an answer to the first amended complaint, denying any liability and including a counterclaim against Beckman Coulter for false patent marking. On February 27, 2025, Beckman Coulter filed an answer to the counterclaim, denying liability. Claim construction hearings were held on August 21, 2025 and September 17, 2025. At the second claim construction hearing, the court ordered Beckman Coulter to narrow the number of asserted claims, and Beckman Coulter has dropped all asserted claims from U.S. Patent No. 12,174,106. Briefing on dispositive motions is currently scheduled in March and April of 2026, and a trial is scheduled for August 17, 2026. The Company intends to vigorously defend itself and pursue the counterclaim.

The Company evaluates the status of each legal matter, if any, and assesses potential financial exposure. If the potential loss from any legal proceedings or litigation is considered probable and the amount can be reasonably estimated, the Company accrues a liability for the estimated loss. Significant judgment is required to determine the probability of a loss and whether the amount of the loss is reasonably estimated. The outcome of any proceeding is not determinable in advance. As a result, the assessment of a potential liability and the amount of accruals recorded are based on the information available at the time.

19. Product warranty

The following table shows the activity in the product warranty accrual included in accrued expenses on the consolidated balance sheets (in thousands):

20. Net (loss) income attributable to common stockholders per share

The following table sets forth the computation of the Company’s basic and diluted net (loss) income per share for the three and nine months ended September 30, 2025 and 2024, respectively (in thousands except share and per share data):

Because the Company had a net loss during the three months ended September 30, 2025,1.2 million shares were dilutive, but were not included in the computation of diluted net loss per share because their inclusion would have been anti-dilutive. Therefore, for the three months ended September 30, 2025, basic net loss per share is the same as diluted net loss per share.

For the three months ended September 30, 2024, diluted EPS includes the impact of outstanding RSUs and stock options, while shares from the ESPP were excluded due to their anti-dilutive effect. For the three months ended September 30, 2024, the basic weighted average shares outstanding were 131,003,744. The treasury stock method was applied to add 1,754,814 shares from stock options and 26,994 shares from RSUs.

Because the Company had a net loss during the nine months ended September 30, 2025 and 2024, respectively,1.4 million and 2.0 million shares were dilutive, but were not included in the computation of diluted net loss per share because their inclusion would have been anti-dilutive. Therefore, basic net loss per share is the same as diluted net loss per share.

21. Segment Information and Geographic Data

Segment Information

The Company operates and manages its business activities on a consolidated basis and hasone operating and reportable segment, as defined under ASC 280, Segment Reporting. Operating segments are defined as components of an enterprise where separate financial information is evaluated regularly by the Chief Operating Decision Maker (“CODM”), who decides how to allocate resources and assess performance. The Company’s Chief Executive Officer serves as the CODM and is responsible for evaluating the Company’s financial performance and allocating resources. The CODM uses net income as the measure of profit or loss to allocate resources, assess performance, and monitor budgets against actual results.

Further, the CODM reviews the significant segment expenses in the table below on net loss when assessing performance and allocating resources, as well as those used for strategic decisions related to headcount and capital expenditures. The measure of segment assets is reported on the balance sheet as total assets. The CODM does not review segment assets at a level other than that presented in the Company’s consolidated balance sheets.

The following table reflects the Company’s significant segment expenses:

Other segment items include other income (expenses) and interest income (expenses).

The Company sells its products worldwide and attributes revenue to the geography where the product is delivered. The geographical distribution of revenue for the three and nine months ended September 30, 2025 and 2024 was as follows (in thousands):

EMEA includes Europe, the Middle East and Africa; APAC includes Asia and the Pacific countries; Other includes Canada and Latin America.

For revenue, a major country is defined as a group of customers in a country with combined revenue of greater than 10% of consolidated revenue or as otherwise deemed significant. Revenue in the United States was approximately $27.2 million and $69.6 million for the three and nine months ended September 30, 2025, respectively. Revenue in China was approximately $5.3 million and $14.2 million for the three and nine months ended September 30, 2025, respectively. No other country represented greater than 10% of the Company’s consolidated net sales or was otherwise deemed significant. For the three and nine months ended September 30, 2025, and 2024, the Company had no major customers that represented more than 10% of the Company’s total revenue.

As of September 30, 2025 and December 31, 2024, the Company’s long-lived assets by geographic area were as follows (in thousands):

As of September 30, 2025 and December 31, 2024, most of the Company’s long-lived assets were located in the United States and in Wuxi, China.